Optimise "50" versions of qml components

Fixes for older versions of Cura are no longer applicable here.

Author: fieldOfView

resources/qml/ExtruderTabs50.qml

@@ -12,23 +12,8 @@ TabRow
     id: tabBar
 
     property var extrudersModel: CuraApplication.getExtrudersModel()
-    property bool hasMaterials:
-    {
-        if (CuraSDKVersion >= "6.2.0") {
-            return (Cura.MachineManager.activeMachine != null) ? Cura.MachineManager.activeMachine.hasMaterials : false
-        } else {
-            return Cura.MachineManager.hasMaterials
-        }
-    }
-    property bool hasVariants:
-    {
-        if (CuraSDKVersion >= "6.2.0") {
-            return (Cura.MachineManager.activeMachine != null) ? Cura.MachineManager.activeMachine.hasVariants : false
-        } else {
-            return Cura.MachineManager.hasVariants
-        }
-    }
-
+    property bool hasMaterials: (Cura.MachineManager.activeMachine != null) ? Cura.MachineManager.activeMachine.hasMaterials : false
+    property bool hasVariants: (Cura.MachineManager.activeMachine != null) ? Cura.MachineManager.activeMachine.hasVariants : false
     visible: hasMaterials || hasVariants
     width: parent.width
     height: UM.Theme.getSize("extruder_icon").height + UM.Theme.getSize("narrow_margin").height

resources/qml/ProfileSelector50.qml

@@ -135,14 +135,7 @@ Item
             anchors.rightMargin: UM.Theme.getSize("default_margin").width
 
             color: hovered ? UM.Theme.getColor("setting_control_button_hover") : UM.Theme.getColor("setting_control_button");
-            iconSource:
-            {
-                if(isLE410)
-                {
-                    UM.Theme.getIcon("star")
-                }
-                return UM.Theme.getIcon("StarFilled")
-            }
+            iconSource: UM.Theme.getIcon("StarFilled")
 
             onClicked:
             {

resources/qml/ViewOptionsPanel40.qml

@@ -144,14 +144,7 @@ Rectangle
                 {
                     return UM.Controller.activeView.stageMenuComponent;
                 }
-                if (isLE413)
-                {
-                    return "PrepareStageLegend40.qml";
-                }
-                else
-                {
-                    return "PrepareStageLegend50.qml";
-                }
+                return "PrepareStageLegend40.qml";
             }
 
             onLoaded:

resources/qml/ViewOptionsPanel50.qml

@@ -66,12 +66,9 @@ Rectangle
             {
                 Component.onCompleted:
                 {
-                    if(!isLE410)
+                    for(var child_nr in children)
                     {
-                        for(var child_nr in children)
-                        {
-                            children[child_nr].iconMargin = 3 * UM.Theme.getSize("default_lining").width
-                        }
+                        children[child_nr].iconMargin = 3 * UM.Theme.getSize("default_lining").width
                     }
                 }
             }
@@ -144,14 +141,7 @@ Rectangle
                 {
                     return UM.Controller.activeView.stageMenuComponent;
                 }
-                if (isLE413)
-                {
-                    return "PrepareStageLegend40.qml";
-                }
-                else
-                {
-                    return "PrepareStageLegend50.qml";
-                }
+                return "PrepareStageLegend50.qml";
             }
 
             onLoaded: